JP7227092B2 - 多重使用の使い捨て注入ペン - Google Patents
多重使用の使い捨て注入ペン Download PDFInfo
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- JP7227092B2 JP7227092B2 JP2019125417A JP2019125417A JP7227092B2 JP 7227092 B2 JP7227092 B2 JP 7227092B2 JP 2019125417 A JP2019125417 A JP 2019125417A JP 2019125417 A JP2019125417 A JP 2019125417A JP 7227092 B2 JP7227092 B2 JP 7227092B2
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Description
投与量設定摘み2の環状肩部21は、セットバック部材9の拡大ヘッド91上に設けられた同じ形状をした歯または隆起部92と係合する一連の歯または隆起部22を備えることが好ましい。投与量設定摘みの歯22およびセットバック部材の歯92は、軸方向の逆向きに突出することが好ましい。投与量設定中、投与量設定摘み2は、セットバック部材9に対して、時計回りおよび反時計回りの両方向に自由に回転できる。これが起きると、投与量設定摘み2の複数の歯または隆起部22は、セットバック部材9のヘッド部分91に設けられた歯92を通り過ぎ、したがって、触覚信号またはカチッという音をもたらし、投与量の設定を知らせる。さらに以下に説明するように、投与量設定摘み2は、セットバック部材9が投与量設定摘み2とともに設定方向に回転することを防止する一方向ラチェットにより、設定中、セットバック部材9に対して回転することができる。
Claims (9)
- ハウジング、
少なくとも1つの内部歯を備える投与量設定摘み、
軸方向に延在する複数のキー溝を有する制動部材、
前記投与量設定摘みの前記少なくとも1つの内部歯と係合する少なくとも1つの外部歯および前記制動部材の前記軸方向に延在する複数のキー溝に係合する少なくとも1つのラチェット・アームを含んでいるドライバー、ならびに
前記ハウジングの基端部に設けられた押し釦
を備え、
前記少なくとも1つの内部歯および前記少なくとも1つの外部歯は互いに対して摺動しながら回転するように構成され、前記投与量設定摘みの回転による投与量設定中および投与量修正中において、前記少なくとも1つの内部歯が前記少なくとも1つの外部歯から回転可能に外れ、
前記ラチェット・アームおよび前記キー溝は、相対的な一方向のみへの回転を許容するように構成され、前記少なくとも1つのラチェット・アームは、前記軸方向に延在する複数のキー溝に係合し、前記ドライバーは、前記投与量設定摘みとともに回転することが妨げられ、
投与量注入中において、前記押し釦が押されて、付勢する方向に力を加えることにより、前記ドライバーの前記少なくとも1つの外部歯と、前記投与量設定摘みの前記内部歯とがともに回転されるようにかみ合い、その結果、前記少なくとも1つのラチェット・アームは前記軸方向に延在するキー溝を通り過ぎ、前記ドライバーが前記投与量設定摘みとともに回転することを可能にすることを特徴とする薬剤注入ペン。 - 投与量設定中および投与量修正中における前記ドライバーに対する前記投与量設定摘みの回転は、前記少なくとも1つの内部歯が前記少なくとも1つの外部歯を超えて摺動することにより、第1の可聴式のしるしを発生し、注入中における前記制動部材に対する前記ドライバーの回転は、前記ラチェット・アームが前記キー溝を超えて摺動することにより、第2の可聴式のしるしを発生することを特徴とする請求項1に記載の薬剤注入ペン。
- 前記制動部材との係合を介して軸方向に固定された送りねじをさらに備え、
投与量設定中および投与量修正中において、前記送りねじが、前記ドライバーとの係合により回転可能に固定され、前記送りねじはキーを有し、前記ドライバーはスロットを有し、前記ドライバーが前記送りねじに対して軸方向に移動するように前記キーがスロットと係合し、投与量注入中において、前記送りねじが前記ドライバーとともに回転することを特徴とする請求項1に記載の薬剤注入ペン。 - 前記送りねじとねじ係合するピストン・ロッドをさらに備え、
注入中において、前記ピストン・ロッドが、前記送りねじの回転により、軸方向に移動することを特徴とする請求項3に記載の薬剤注入ペン。 - 前記投与量設定中および前記投与量修正中において、前記ドライバーは、送りねじに対して軸方向に移動することを特徴とする請求項4に記載の薬剤注入ペン。
- 前記スロットの長さは、最大投与量の設定に対応することを特徴とする請求項5に記載の薬剤注入ペン。
- 前記ドライバーに配置された投与量停止部材をさらに備え、
前記投与量停止部材は、前記投与量設定摘みの内面に配置される突起に係合し、投与量設定中および投与量修正中において、前記投与量設定摘みが前記ドライバーおよび前記投与量停止部材に対して回転すると、前記投与量停止部材は、前記ドライバー上を軸方向に移動し、
前記投与量停止部材は、投与量注入中において、前記ドライバーとともに回転し、かつ前記投与量設定摘みに対するその位置を維持し、
前記投与量停止部材は、前記薬剤注入ペンに残っている薬剤の量を超える投与量を設定するための前記投与量設定摘みの移動を妨げることを特徴とする請求項1に記載の薬剤注入ペン。 - 前記制動部材は、前記送りねじの外面にスナップ係合することを特徴とする請求項3に記載の薬剤注入ペン。
- 前記少なくとも1つのラチェット・アームと前記制動部材のキー溝との間にもたらされる摩擦は、投与量修正方向における前記ドライバーおよび前記投与量設定摘み上の歯の摩擦より大きく、それにより、前記投与量設定摘みは、前記ドライバーの回転を引き起こすことなく、設定投与量を修正するために回転して戻されることができることを特徴とする請求項1に記載の薬剤注入ペン。
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